@smilingstone US employers understand some of the logistics of USCIS immigration since they must abide by the same laws when hiring.
To show potential employers that you are not just sitting around doing nothing while waiting for work authorization, you can earn professional certifications or licenses like real estate license, driver's license, food handler certification, AI certification, etc.--many of which have minimal fees or costs or even free.
I recommend that all new immigrants learn all of the Khan Academy Personal Finance and Financial Literacy courses, and supplement with any other materials to get a good understanding of the US money culture, like taxes, tippings, Roth IRA, etc.
One recent K1 beneficiary that my foreign spouse was keeping in touch with got her EAD within 6 months of US entry and followed the strategy above. During the 6 months, she got married, filed for the I-485/I-765, got her motorcycle license, learned enough about the US money culture, etc. After she got the EAD, she applied and got hired with UberEats delivering food and now makes a pretty good living for herself and her husband.